(Original post by h3rmit)
If you get a U, probably not. Some teachers will allow those getting E's to pass through on a case by case basis. Revising is a better use of your time that worrying about your grades though

Definitely there will be questions on the different mechanisms; nucleophilic substitution, electrophilic addition and free-radical substitution needs to be known.

Possible six markers can be based on a combination of different topics. It is difficult to predict 6 markers for chemistry. The practice paper had 6 markers on alcohols and dyanmic equilibrium which are good topics to be asked on. However, the practice paper may not look similar to actual papers...

(Original post by mollyayo)
Is there a mechanism we need to know for radical substitution? I know about initiation, propagation and termination but is there any curly arrows or anything we need to know??

Free radical substitution does not form curly arrows, they form radicals only.

Electrophilic addition and nucleophilic substitution are the only mechanisms that involve curly arrows and any relevant dipoles.

Yo please can I have some help with this question.
Curing an experiment 11.50g of ethanol is completely burnt in air. During the combustion 341.5KJ of heat energy is released.
What is the enthalpy change of combustion of ethanol?

(Original post by Farmerjj)
Yo please can I have some help with this question.
Curing an experiment 11.50g of ethanol is completely burnt in air. During the combustion 341.5KJ of heat energy is released.
What is the enthalpy change of combustion of ethanol?

(Original post by harryleavey)
As I just said, the equations are a mechanism.
If you are under the impression that there is a 'displayed mechanism' for free radical substitution reactions - there isn't one.

I have attached a picture of the 3 mechanisms we need to know.
I hope this helps

The boiling points of three liquids, A, B and C are 65, 141, and 80 respectively. Liquid A reacts with liquid B to produce liquid C and water. Distillation of the reaction mixture produces four pure liquids, which are collected as they form in separate beakers. Which beaker (1st, 2nd, 3rd or 4th) would contain water?